Which is the warmest layer of the atmosphere?

In which layer of the atmosphere is ozone found?

• Answer:

  It is in the stratosphere, located 8 to 50km above sea level. The ozone layer surrounds the earth, meaning that it's wrapped around earth. The altitude varies with latitude as well, placing the stratosphere and the ozone layer closer to the Earth's surface over the poles. The highest concentration of ozone is in the lower stratosphere, also called the tropopause, and the ozone here is called the ozone layer. Ozone is also found in the lower atmosphere, also called the troposphere, and the ozone here is one component of smog. Ozone concentrations vary from near zero at extreme elevations (high in the exosphere), to a maximum (~9 ppm) at the bottom of the stratosphere, to zero again near Earth's surface (the troposphere ends here). So some ozone is found in every layer of the atmosphere (usually less than 1 ppm, except for the stratosphere). When it is winter at one of the poles, there is no UV-C to make ozone, and since ozone decays with time, an "ozone hole" forms. The size of the hole depends on how many contaminants are present to accelerate the decay of ozone. Ozone is concentrated at 20-40 km above earth with highest concentration 6-8 parts per million. It is present in the stratosphere of the earth's atmosphere.